A new method to quantify postexercise ST‐deviation – the ST‐deficit. A study in men at high and low‐risk for coronary heart disease

Abstract

Effort-related myocardial ischaemia is frequently silent in elderly high-risk hypertensives and necessitates testing, preferably with computerized exercise ECG and heart rate adjusted ST criteria. A new quantitative variable to assess the postexercise rate-recovery loop in the time domain, the ST-deficit is described. This variable seems to effectively discriminate between subjects with low and high-risk for coronary heart disease and thus provides new information. Further studies are warranted to validate this variable against myocardial perfusion scintigraphy and coronary angiography.

Exercise electrocardiography detection of coronary artery disease by ST-segment depression/heart rate hysteresis in women: The Finnish Cardiovascular Study

“…Other researchers have also shown ST/HR analysis integrating exercise and recovery to improve the diagnostic capacity of exercise ECG [15][16][17][18]. However, the majority of patients in the previous studies have been men, and hitherto the diagnostic performance of ST/HR hysteresis in women has been unknown.…”

Exercise electrocardiography for diagnosis of coronary artery disease: impact of sampling rate on the diagnostic performance of ST/HR‐loop based on data from early recovery phase

“…, 2005). The quantification of ST/HR loops can be obtained by calculation of the difference between the ST‐segment amplitude during recovery phase and the ST‐segment amplitude at the corresponding HR during exercise (Suurküla et al. , 2001; Kronander et al.…”

“…, 1989; Lehtinen et al. , 1996; Suurküla et al. , 2001) offers yet another diagnostic possibility, with performance superior to both that of ST/HR index and ST/HR slope.…”

Nonlinear Methods of Cardiovascular Physics and Their Clinical Applicability

“…However more recent studies showed that low amplitude T-wave alternans discriminates patients with ventricular tachycardia (VT) or ventricular fibrillation (VF) from those without VT or VF [Rosenbaum et al, 1996]. The analysis of the ST-segment is a standardized method of ECG analysis, but surprisingly no variability of this segment has been considered so far [Lehtinen et al, 1996;Suurkula et al, 2001]. There are two types of ST-T wave abnormalities which are very common and may be seen in any lead of the ECG: an ST segment depression and an ST segment elevation.…”